On the influence of crack front curvature on the fracture behavior of nanoscale cracks

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Möller J, Bitzek E
Zeitschrift: Engineering Fracture Mechanics
Verlag: Elsevier
Jahr der Veröffentlichung: 2015
Band: 150
Seitenbereich: 197-208
ISSN: 0013-7944
Sprache: Englisch


Abstract


Atomic-scale fracture processes are traditionally investigated in quasi-2D models of straight, infinite cracks. This approach neglects crack front curvature effects, which might be particularly important for nanoscale crack nuclei in semi-brittle materials. Here we use 3D atomistic simulations to study penny-shaped cracks in body-centered cubic metals. Our results show extensive crack tip plasticity initiated by deformation twinning and followed by emission of screw dislocations which cross-slip along the crack front. Together with the interactions of dislocations and/or twins that are nucleated at differently oriented parts of the crack, these processes determine the fracture behavior of highly curved nanoscale cracks.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Bitzek, Erik Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Simulation und Werkstoffeigenschaften)
Möller, Johannes
Professur für Werkstoffwissenschaften (Simulation und Werkstoffeigenschaften)


Zusätzliche Organisationseinheit(en)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Exzellenz-Cluster Engineering of Advanced Materials


Forschungsbereiche

A3 Multiscale Modeling and Simulation
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Möller, J., & Bitzek, E. (2015). On the influence of crack front curvature on the fracture behavior of nanoscale cracks. Engineering Fracture Mechanics, 150, 197-208. https://dx.doi.org/10.1016/j.engfracmech.2015.03.028

MLA:
Möller, Johannes, and Erik Bitzek. "On the influence of crack front curvature on the fracture behavior of nanoscale cracks." Engineering Fracture Mechanics 150 (2015): 197-208.

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Zuletzt aktualisiert 2019-08-02 um 14:11